ISO 17804:2020

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 17804
ISO/TC 25
Founding — Ausferritic spheroidal
Secretariat: BSI
graphite cast irons — Classification
Voting begins on:
2020­03­11
Fonderie — Fontes ausferritiques à graphite sphéroïdal —
Classification
Voting terminates on:
2020­05­06
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Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 17804:2020(E)
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©
NATIONAL REGULATIONS. ISO 2020

ISO/FDIS 17804:2020(E)
© ISO 2020
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ii © ISO 2020 – All rights reserved

ISO/FDIS 17804:2020(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation . 2
5 Order information . 3
6 Manufacture . 3
7 Requirements . 3
7.1 General . 3
7.2 Test pieces machined from cast samples . 3
7.2.1 General. 3
7.2.2 Impact test . 4
7.3 Test pieces machined from samples cut from a casting . 5
7.4 Hardness . 5
7.5 Graphite structure . 5
7.6 Matrix structure . 5
8 Sampling . 5
8.1 General . 5
8.2 Cast samples . 6
8.2.1 Size of cast samples . 6
8.2.2 Frequency and number of tests . 6
8.2.3 Separately cast samples . 7
8.2.4 Side-by-side cast samples . 9
8.2.5 Cast­on samples .10
8.2.6 Test pieces machined from cast samples .12
8.3 Samples cut from a casting .12
8.4 Formation of test units and number of tests .13
8.4.1 General.13
8.4.2 Examples of test units .13
8.4.3 Number of tests per test unit .13
9 Test methods .13
9.1 Tensile test .13
9.2 Impact test .14
9.3 Hardness test .14
9.4 Graphite structure examination .15
10 Retests .15
10.1 Need for retesting .15
10.2 Test validity .15
10.3 Nonconforming test results .15
10.4 Heat treatment of samples and castings .15
11 Additional information .16
Annex A (normative) Abrasion-resistant grades of ausferritic spheroidal graphite cast iron .17
Annex B (normative) Minimum elongation values for a test piece with original gauge length
L = 4 × d .19
o
Annex C (informative) Guidance values for Brinell hardness .21
Annex D (informative) Procedure for the determination of the hardness range .22
ISO/FDIS 17804:2020(E)
Annex E (informative) Guidance values for tensile strength and elongation after fracture
[ ]
for test pieces machined from samples cut from a casting 4 .24
Annex F (informative) Unnotched impact test .25
Annex G (informative) Additional information on mechanical and physical properties .27
Annex H (informative) Nodularity .31
Annex I (informative) Sectioning procedure for cast samples .32
Annex J (informative) Cross-references of similar grades of ausferritic spheroidal graphite
cast iron .33
Bibliography .34
iv © ISO 2020 – All rights reserved

ISO/FDIS 17804:2020(E)
Foreword
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different types of ISO documents should be noted. This document was drafted in accordance with the
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This document was prepared by Technical Committee ISO/TC 25, Cast irons and pig irons.
This second edition cancels and replaces the first edition (ISO 17804:2005), which has been technically
revised. The main changes compared with the previous edition are as follows:
a) the normative references have been updated;
b) the terms and definitions have been improved and supplemented;
c) a side-by-side cast sample has been included;
d) the method of manufacturing has been made more detailed (including pouring/heat treatment);
e) a subclause (9.4) for graphite structure examination has been added;
f) in Annex C (formerly Annex B), a new conversion table for tensile test
...